Wikileaks has published pager intercepts from New York on 9/11:
WikiLeaks released half a million US national text pager intercepts. The intercepts cover a 24 hour period surrounding the September 11, 2001 attacks in New York and Washington.
Text pagers are usualy carried by persons operating in an official capacity. Messages in the archive range from Pentagon, FBI, FEMA and New York Police Department exchanges, to computers reporting faults at investment banks inside the World Trade Center.
Near as I can tell, these messages are from the commercial pager networks of Arch Wireless, Metrocall, Skytel, and Weblink Wireless, and include all customers of that service: government, corporate, and personal.
There are lots of nuggets in the data about the government response to 9/11:
One string of messages hints at how federal agencies scrambled to evacuate to Mount Weather, the government’s sort-of secret bunker buried under the Virginia mountains west of Washington, D.C. One message says, “Jim: DEPLOY TO MT. WEATHER NOW!,” and another says “CALL OFICE (sic) AS SOON AS POSSIBLE. 4145 URGENT.” That’s the phone number for the Federal Emergency Management Agency’s National Continuity Programs Directorate—which is charged with “the preservation of our constitutional form of government at all times,” even during a nuclear war. (A 2006 article in the U.K. Guardian newspaper mentioned a “a traffic jam of limos carrying Washington and government license plates” heading to Mount Weather that day.)
FEMA’s response seemed less than organized. One message at 12:37 p.m., four hours after the attacks, says: “We have no mission statements yet.” Bill Prusch, FEMA’s project officer for the National Emergency Management Information System at the time, apparently announced at 2 p.m. that the Continuity of Operations plan was activated and that certain employees should report to Mt. Weather; a few minutes later he sent out another note saying the activation was cancelled.
Historians will certainly spend a lot of time poring over the messages, but I’m more interested in where they came from in the first place:
It’s not clear how they were obtained in the first place. One possibility is that they were illegally compiled from the records of archived messages maintained by pager companies, and then eventually forwarded to WikiLeaks.
The second possibility is more likely: Over-the-air interception. Each digital pager is assigned a unique Channel Access Protocol code, or capcode, that tells it to pay attention to what immediately follows. In what amounts to a gentlemen’s agreement, no encryption is used, and properly-designed pagers politely ignore what’s not addressed to them.
But an electronic snoop lacking that same sense of etiquette might hook up a sufficiently sophisticated scanner to a Windows computer with lots of disk space—and record, without much effort, gobs and gobs of over-the-air conversations.
Existing products do precisely this. Australia’s WiPath Communications offers Interceptor 3.0 (there’s even a free download). Maryland-based SWS Security Products sells something called a “Beeper Buster” that it says let police “watch up to 2500 targets at the same time.” And if you’re frugal, there’s a video showing you how to take a $10 pager and modify it to capture everything on that network.
It’s disturbing to realize that someone, possibly not even a government, was routinely intercepting most (all?) of the pager data in lower Manhattan as far back as 2001. Who was doing it? For that purpose? That, we don’t know.